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02c71055e5
linux/arch/s390/kernel
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Martin Schwidefsky 33fea794b9 [S390] etr: fix clock synchronization race 
The etr events switch-to-local and sync-check disable the synchronous clock
and schedule a work queue that tries to get the clock back into sync.
If another switch-to-local or sync-check event occurs while the work queue
function etr_work_fn still runs the eacr.es bit and the clock_sync_word can
become inconsistent because check_sync_clock only uses the clock_sync_word
to determine if the clock is in sync or not. The second pass of the
etr_work_fn will reset the eacr.es bit but will leave the clock_sync_word
intact. Fix this race by moving the reset of the eacr.es bit into the
switch-to-local and sync-check functions and by checking the eacr.es bit
as well to decide if the clock needs to be synced.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-07-27 19:29:42 +02:00
..
vdso32 [S390] vdso: use ntp adjusted clock multiplier 2010-04-22 17:17:19 +02:00
vdso64 [S390] vdso: use ntp adjusted clock multiplier 2010-04-22 17:17:19 +02:00
asm-offsets.c [S390] spp: fix compilation for CONFIG_32BIT 2010-05-26 23:26:29 +02:00
audit.c
audit.h
base.S [S390] Cleanup struct _lowcore usage and defines. 2010-02-26 22:37:31 +01:00
bitmap.c
compat_audit.c
compat_exec_domain.c
compat_linux.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
compat_linux.h
compat_ptrace.h
compat_signal.c
compat_wrapper.S improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
cpcmd.c
crash.c
debug.c [S390] avoid default_llseek in s390 drivers 2010-05-17 10:00:16 +02:00
diag.c
dis.c [S390] add z9-ec/z10 instruction to kernel disassembler 2010-02-26 22:37:32 +01:00
early.c [S390] virtualization aware cpu measurement 2010-05-17 10:00:15 +02:00
ebcdic.c
entry64.S [S390] Fix IRQ tracing in case of PER 2010-07-27 19:29:42 +02:00
entry.h improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
entry.S [S390] Fix IRQ tracing in case of PER 2010-07-27 19:29:42 +02:00
ftrace.c Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-02-28 10:17:55 -08:00
head31.S [S390] correct address of _stext with CONFIG_SHARED_KERNEL=y 2010-05-12 09:32:26 +02:00
head64.S [S390] correct address of _stext with CONFIG_SHARED_KERNEL=y 2010-05-12 09:32:26 +02:00
head.S [S390] More cleanup for struct _lowcore 2010-05-17 10:00:15 +02:00
init_task.c
ipl.c sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
irq.c
kprobes.c [S390] kprobes: forbid probing of stnsm/stosm/epsw 2010-05-26 23:26:29 +02:00
machine_kexec.c
Makefile [S390] add support for compressed kernels 2010-02-26 22:37:33 +01:00
mcount64.S
mcount.S
mem_detect.c
module.c [S390] kprobes: add parameter check to module_free() 2010-06-08 18:58:23 +02:00
nmi.c [S390] idle time accounting vs. machine checks 2010-05-17 10:00:15 +02:00
process.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
processor.c [S390] More cleanup for struct _lowcore 2010-05-17 10:00:15 +02:00
ptrace.c [S390] add breaking event address for user space 2010-05-17 10:00:15 +02:00
reipl64.S [S390] Cleanup struct _lowcore usage and defines. 2010-02-26 22:37:31 +01:00
reipl.S [S390] Cleanup struct _lowcore usage and defines. 2010-02-26 22:37:31 +01:00
relocate_kernel64.S
relocate_kernel.S
s390_ext.c [S390] idle time accounting vs. machine checks 2010-05-17 10:00:15 +02:00
s390_ksyms.c
sclp.S Merge branch 'for-next' into for-linus 2010-03-08 16:55:37 +01:00
setup.c [S390] spp: fix compilation for CONFIG_32BIT 2010-05-26 23:26:29 +02:00
signal.c [S390] add breaking event address for user space 2010-05-17 10:00:15 +02:00
smp.c s390: convert cpu notifier to return encapsulate errno value 2010-05-27 09:12:48 -07:00
stacktrace.c
suspend.c
switch_cpu64.S [S390] Cleanup struct _lowcore usage and defines. 2010-02-26 22:37:31 +01:00
switch_cpu.S [S390] Cleanup struct _lowcore usage and defines. 2010-02-26 22:37:31 +01:00
swsusp_asm64.S Merge branch 'for-35' of git://repo.or.cz/linux-kbuild 2010-06-01 08:55:52 -07:00
sys_s390.c improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
syscalls.S improve sys_newuname() for compat architectures 2010-03-12 15:52:32 -08:00
sysinfo.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
time.c [S390] etr: fix clock synchronization race 2010-07-27 19:29:42 +02:00
topology.c [S390] topology: expose core identifier 2010-05-17 10:00:16 +02:00
traps.c [S390] debug: enable exception-trace debug facility 2010-05-17 10:00:17 +02:00
vdso.c [S390] vdso: remove redundant check for CONFIG_64BIT 2010-05-17 10:00:16 +02:00
vmlinux.lds.S
vtime.c [S390] idle time accounting vs. machine checks 2010-05-17 10:00:15 +02:00